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====== Sed ======

[[wp>sed|sed]], a stream editor.

===== Usage =====

==== Replace ====

Replace ''word'' with ''words'' from file:

  sed -i 's|word|words' file

Replace multiple target (sperate with '';''):

  sed -i 's|word|words;s|hello|bye' file

==== Delete ====

Delete lines contain ''import'':

  sed -i '/import/d' file

Delete lines contain ''import'' **and the next line**:

  sed -i '/import/,+1d' file

Delete specify line by line number [(cite:>[[http://stackoverflow.com/a/6022431|bash tool to get nth line from a file]])]

  sed -i "${NUM}q;d" file

==== Create backup file ====

Directly modify file and create a backup file:

  sed -i.bak 's/test/ok/g' file

===== Reference =====

  * https://www.gnu.org/software/sed/manual/sed.html
  * http://www.grymoire.com/Unix/Sed.html
  * https://www.digitalocean.com/community/tutorials/the-basics-of-using-the-sed-stream-editor-to-manipulate-text-in-linux